Performance of the invasive Eupatorium catarium and Ageratum conyzoides in comparison with a common native plant under varying levels of light and moisture
Performance of the invasive Eupatorium catarium and Ageratum conyzoides in comparison with a common native plant under varying levels of light and moisture
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入侵性紫茎泽兰和苋菜在不同光照和湿度水平下的表现与常见本土植物的比较
DOI：
10.1111/wbm.12125
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发表时间：
2017-06
影响因子：
1.4
通讯作者：
Yan Liu
中科院分区：
文献类型：
--
作者：
Qiaoqiao Huang;Yide Shen;Xiaoxia Li;Zhiwei Fan;Shaoliang Li;Yan Liu
外来入侵植物往往比本地植物更具可塑性，这使得前者在某些或大范围的环境条件下优于本地植物。此外，他们在非竞争条件下的表现可能无法预测他们在竞争条件下的表现。最近的入侵者，泽兰catarium，的性能进行了比较，与历史上的入侵者，胜红蓟，和一个共同的本地植物，斑鸠菊，在不同水平的光和水分的竞争和不竞争。当单独生长时，E.在根冠比上，紫花苜蓿和灰葡萄的可塑性较好。而灰葡萄比叶面积（SLA）可塑性较E. catarium和A.孢子虫。紫茎泽兰的可塑性比紫茎泽兰强。小孢子虫和灰葡萄对干旱的响应。然而，性状可塑性的这些差异并没有导致在每个光和水分处理组合下的生物量生产的差异。当E. catarium与A竞争。在不同的光湿处理组合下，互作物种的生物量和相对互作强度也没有显著差异。这些结果表明，这两个入侵物种和本地植物没有不同的表现，在相对较低的土壤养分条件下，无论水分，光照和竞争的处理。因此，E. catarium和A.在低营养条件下，无论光和水的可用性如何，conyzoides都不能胜过V. cinerea。
Invasive alien plants are often found to be more plastic than the natives, which enable the former to outperform the native plants under some, or in a wide range, of environmental conditions. In addition, their performance under non-competitive conditions might not predict their performance under competitive conditions. The performance of the recent invader, Eupatorium catarium, was compared with that of a historical invader, Ageratum conyzoides, and a common native plant, Vernonia cinerea, under varying levels of light and moisture with and without competition. When grown alone and in response to decreases in light levels, E. catarium and V. cinerea were more plastic in their root-to-shoot ratio than A. conyzoides, while V. cinerea was more plastic in its specific leaf area (SLA) than E. catarium and A. conyzoides. Eupatorium catarium was more plastic than A. conyzoides and V. cinerea in the SLA in response to the drought treatment. However, these differences in trait plasticities did not lead to a difference in biomass production under each light and moisture treatment combination. When E. catarium was competing with either A. conyzoides or V. cinerea, the interacting species also did not differ in their biomass production and relative interaction intensity under each light and moisture treatment combination. These results indicate that the two invasive species and the native plant do not differ in their performance under relatively low soil nutrient conditions, regardless of the moisture, light and competition treatments that are imposed. Therefore, E. catarium and A. conyzoides cannot outperform V. cinerea under low nutrient conditions, regardless of the light and water availability.
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